FIxed Float64#to_s for 0.9999... Fixes #3292

crystal-lang · Sep 11, 2016 · e4dd5b4 · e4dd5b4
1 parent c7f06c7
commit e4dd5b4
Showing 2 changed files with 2 additions and 1 deletion.
diff --git a/spec/std/float_spec.cr b/spec/std/float_spec.cr
@@ -126,6 +126,7 @@ describe "Float" do
       65432.1234567891e20.to_s.should eq("6.54321234567891e+24")
       (1.0/0.0).to_s.should eq("Infinity")
       (-1.0/0.0).to_s.should eq("-Infinity")
+      (0.99999999999999989).to_s.should eq("1.0")
     end
 
     it "does to_s for f32" do

diff --git a/src/float.cr b/src/float.cr
@@ -361,7 +361,7 @@ struct Float64
         # Need to add one and carry to the left
         len = max_run_start
         index = len - 1
-        while index > 0
+        while index >= 0
           byte = slice.to_unsafe[index]
           case byte
           when '.'